Tester for the sparking plugs of motor cars



March 17, 1931. G. SLUPINSKI TESTER FOR THE SPARKING PLUGS OF MOTOR CARS Filed Oct.

I lllll I'll llll 1 4 lTlllllllPilllllllllllll 111/1 M Gustav Ins/a Patented -Mar. 17, 1931 UNITED srrts PATENT QFFICE GUSTAV FvLUPINSKI, OF BREIYIEN, GERMANY, ASSIGNOR OF ONE-HALF TO THE COM- PANY Ll 'DERSWERE G. M. B. H., OF BREMEN, GERMANY TESTER FOR THE SPARKING ELUGS OF MOTOR CARS Application filed October 24, 1928, Serial Itlo 314,614, and in Germany July 2, 1928.

This invention relates to a. tester for sparking plugs on motor-oairs in which in e casing fixed on theZdash-borrrd several sparking plug-testers consisting for instance each of e tube or the like filled with neonges are arranged so that they can be put in circuit,

With the commonly used sppsretus it Wes impossible to test at the same time the sperlning plugs of the 6, 8 or more cylinders of the multicylinder engines unless as many testers were provided as cylinder sparking plugs existed.

The testing apparatus became thereby very large so that it could not be sccommodeted in the limited specs of the dash hoard.

According to the invention any number of sparking plugs can he tested in groups means of it less number testers than there ere sparking plugs" With this object in view the arrangement is made that several spsrlnng plugs of different cylinder sets can he connected icy moons of 5. switch to one end the some tester in order to be tested The invention hes further for its object a, speciel construction of the sparking plug tester in order to obtain at construcion of the device as compact es possible. invention may be carried out in differ ent manners.

@ne emhodiment of the invention is illustreted by way of example in the accompanying drawing in which l, is e front elevation showing the device Fig. 2 is e section on line ll lll' oi Fig, L

Fig 3 is an elevation showin the apperetus connected to an eight cylinder block shown diagrammatically. For testing the sparking plug testers o of known type are mounted insulated in a casing it behind slots 6, a less number oftesters being provided than sparking plugs are to be tested as shown in Fig. 3.

An apparatus with only four testers is required for testing the cylinder sparking plugs 03 of an eight cylinder block 6, said testers being adapted to be connected in sets by means of aswitch to the conductors f The switching is of the sparking plugs.

plate 9 pivotslly effected by means of a mounted in the casing a for movement in different directions from a neutral position to two opposite circuit closing positions and having several ball contacts Z, Z controlled y springs 70, the balls being shiftebly mounted in the two edges 72 2' cl said her, said ball contacts being electrically connected with each other. In the plate on of the casing contacts to having collecting bars o are arranged, said collecting bars being' 111 contact with the poles of the testers c.

(in the outer wall (Z of the casing two rows of connection contacts g are arranged, the one at the top end and the other at the lower end, which as shown in Fig. 3 are connected by the conductors f to the rows of sparking plugs of the cylinder block to he tested.

The plate 9 has a handle r projecting through a slot 8 of the cover plate t of the casing, sold cover-plate serving, as shown in the drawing at the same time as carrier for the testers and their connection contacts.

Between the rows of contacts g a groove ct is arranged at the middle of the casing plate p which is designed to serve for stopping end for e favorable insulating of switch plate Z, when the apparatus is in the inoperative position.

If the hand lever r is turned down the contacts E are brought together with the contects g of the upper row of contacts, so that the spark testers o are connected by means of the contacts Z to the sparking plugs of the one row of cylinders.

In this case the cylinders l to {i are tested as indicated on the outer surface of the spparatus.

' If the lever r is turned upward the sparking plugs of the cylinders 5 to 8 are connected to the testers.

The reversing might be efiected, if desired, by means of any other connection scheme then shown in the drawing.

The invention might be applied to all kinds of motor-driven. vehicles specially motor-cars, motor-boats, flying machines,

ill

- spark and also in stationary internal combustion engines.

I claim p 1. An electrical spark plug tester comprising a casing, groups of contacts carried thereby for connection with groups of spark plugs to be tested in separate groups, a group of testers carried by the casing equal at least in number to the contacts of one group of spark plug contacts but less in number than the total number of spark plug contacts of the groups, contacts connected with the testers, and a switch movable from a neutral position to connect the contacts of the testers with the contactsof one or the other of the spark plug groups.

2. A spark plug tester comprising a casing, groups of contacts carried by the casing for connection with rows of spark plugs of sets of engine cylinders, a group of testers carried by the casing equal at least in numher to the contacts of one group of spark plug contacts but less in number than the total number of spark plug contacts of the spark plug groups, contacts connected with the testers, and a pivotally mounted switch normally in engagement with the tester contacts and out of engagement with the spark plug contacts and movable in one direction or the other to engage one or the other of the groups of spark plug contacts.

3. A spark ing, groups 0 contacts carried by thecasing for connection with rows of spark plugs of sets of engine cylinders, a group of testers of neon tube type carried by the casing and equal in number at least to'the contacts of one grou of spark plug contacts but less in number t an the total number of the spark plug contacts of the spark plug groups, conplug tester comprising a casable in opposite directions to cause said contacts to connect the contacts of the testers with one or the other of the group of spark plug contacts.

5. A spark plug tester comprising a casing, groups of contacts carried by the casing for connection with rows of spark plug of sets of engine cylinders, a group of testers carried by the casing equal at least to the number of contacts of one group of spark plug contacts but less in number than the total number of the spark plug contacts of the spark plug groups, contactsconnccted with the testers, and a pivotally mounted switch in the casing havin pairs of spring actuated contacts at opposite sides thereof, each pair of contacts being electrically connected, one set of the switch contacts normally engaging the contacts of the testers and the other set of contacts of the switch being adapted by pivotal movements of the switch in opposite directions for engagement with one or the'other of the groups oi plug contacts.

In testimony whereof I affix my signature.

GUSTAV SLUPINSKI.

tacts connected with the testers, and a pivotally mounted switch normally insulated from the casing but electrically connected I with the contacts of the testers and movable in op osite directions from said normal position Ior connecting the contacts of the testers with one or the other of the groups of spark plug contacts.

4. A spark'plug tester comprising a casing, groups of contacts arranged at one side of said casing for connection with rows of plugs of sets of engine cylinders, an insulatmg member at said side of the casing between said sets of spark plug contacts, a group of testers arranged at the opposite side of the casing from the side first-named and equal at least in number to the contacts of one group of spark plug contacts but less in number than the total number of spark plug contacts of the spark plug groups, contacts connected with the testers, and a pivotally mounted switch in the casing having electrically connected contacts normally engaging the contacts of the testers and the insulating member, and said switch being movlac 

